New dyestuff of the perylene tetracarboxylic acid series



Patented June 9, 1959 United States relationship of parts by weight to parts by volume being 2,890,220 the same as that of the kilogram to the liter: NEW DYESTUFF OF THE PERYLENE TETRA- Example 1 'CARBOXYLIC ACID SERIES 20 parts of perylene-3,4,9,lO-tetracarboxylic dianhy- Wilhelm Eckert, Frankfurt am Main, and Hermann Remy, dride, 52 parts of 4-aminodiphenyl and 5 parts by vol- Bad Soden (Taunus), Germany, assignors to Farbwerke ume of concentrated hydrochloric acid are introduced in Hoechst Aktiengesellschaft vormals Meister Lucius & su e i i to 400 parts by volume of quinoline, while Briillillg, Frankfurt am Main y, a col'llomfion stirring. The mixture is heated for 14 hours at 210 of Germany C., while continuously distilling off the water. The prod- D A licafionocmbel. 1957 net is then filtered oif with suction in the cold, washed N0 raw] gF 690,203 several times with methanol, boiled with dilute sodium h droxide solution, washed with hot water until utral, Claims priority, application Germany October 24, 1956 i dried ne 1 Chin (Cl. 260 281) 15 The red dyestuif so obtained does not melt at or below 300 C., is sparingly soluble in the customary or- The present invention relates to a new valuable dyeganic solvents and dissolves in concentrated sulfuric acid stuff of the perylene tetracarboxylic acid series, more to give a violet solution eXhibiting fluorescence It particularly it relates to a dyestufi corresponding to the dlstmgulshed by Its extraordinary y and excellent following formula: properties of fastness, both in lacquers and in polyvinyl o 0 ll l In our U.S. patent application Serial No. 661,261, chloride compositions, and possesses a very good fastfiled on May 23, 1957, now abandoned, for New Dyeness to oil, over-spraying, solvents, bleeding, and light. stuif of the Perylene Tetracarboxylic Acid Series is described a process for the manufacture of a dyestuif which Example 2 is especially advantageous for imparting to plastics, such In an autoclave provided with a stirrer, 20 parts of f q gj z 3 3 3 13: f f 1 5 513 53 55g; perylene-3,4,9,IO-tetracarboxylic dianhydride, 52 parts gos se ss very goo il propertie s of fitness, which cimprises g i g f 3 Part.s concentrated Sulfuric condensing perylene-3,4,9,l0-tetracarboxylic acid or its am are p uce m iuccesslon mm 320 Parts of anhydride with para cyclohexyl anfljne ter. The mixture 18 stirred for 12 hours at 200 210 Now we have found that a dyestufi of similar excellent The Product is then filterfid Wlth 5110mm 1n the properties is obtained by reacting perylene-3,4,9,10-tetracold and Worked up f fiescnbed 111 Example The carboxylic acid or its anhydride with 4-aminodiphenyl. dye stufi so obtained 13 Identical with the Product de- The new dyestulf is very suitable as a pigment in the Scflbed in Example printing ink and lacquer industries, for imparting fast We claim: colorings to plastics, such as polyvinyl chloride contain- The dyestufi corresponding to the following formula:

ing a plasticizer, or polyethylene, and also for coloring References Cited in the file of this patent bakeable lacquers or for dyeing spinning solutions.

The following examples serve to illustrate the inven- UNITED STATES PATENTS tion, but they are not intended to limit it thereto, the 1,715,430 Schmidt et a1. June 4, 1929 parts being by weight unless otherwise stated, and the 2,543,747 Shrader Mar. 6, 1951 

